Manufacture of paper-board tubs



W. W. MGEWAN.

MANUPAGTURE 0F PAPER BOARD TUBS.

Patented Aug. 23, 1892.

(No Model.)

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VILLIAM W. MCEWAN, OF BELVIDERE, NEIV JERSEY.

MANUFACTURE OF PAPER-BOARD TUBS.

SPECIFICATION forming part of Letters Patent No. 481,239, dated August23, 1892.

Application filed November 27. 1891. Serial No. 413,211. (No model.)

To aZZ whom, t may concern:

Be it known that I, WILLIAM IV. MCEWAN, of Belvidere, in the county ofIVarren and State of New Jersey, have invented a new and usefulImprovement in the Manufacture of Paper-Board Tubs, dac.; and I dohereby declare that the following is a full and eXact descriptionthereof, reference being had to the accompanying drawings,and to theletters of reference marked thereon, making a part of thisspeciiication.

In the manufacture of foot-tubs and other articles of hollow ware frompaper-board and the like by drawing up or manipulating a single flatsheet of the material itnecessarily happens that the material is more orless plicated toward the upper edge of the article. The consequence isthat unless the article is encircled by a rigid band any considerablepressure from within is liable to open these plications and to crack theenamel or other inish upon the surface of the article. It is sought toprevent this spreading and cracking by applying a hoop to the exteriorof the article; but the hoop can only be heldin place with the requisiterigidity, particularly upon articles which have much flare, by riveting.This is injurious to the appearance of the article and is otherwiseobjectionable. Vere it attempted to secure the hoop in place by sinkingit in a groove in the article after it had been dried the article wouldbe weakened dangerously in a line where it should be strong.

It is the object of my invention to overcome all these objections; andto that end it consists in the method of making the articles referredto, as hereinafter described and claimed.

In the accompanying drawings, wherein I have illustrated the severalsteps of the method, Figure l is a plan view of a sheet of material ofsuitable shape to form a foot-tub. Fig. 2 is a cross-section ot' thefoot-tub after manipulation or drawing up. Fig. 3 isa crosssection ofthe foot-tub and press. Figf4 is a cross-section of the foot-tub as itcomes from the press, and Fig. 5 is a horizontal section of the same onthe line of Fig. 4.

The sheet of material to 'be employed, in a suitably soft and moistcondition, is drawn or manipulated substantially into the shape of thedesired article, as shown at A in Fig. 2, and is encircled by the hoopB. In this condition the plications a a are very apparent. It is thenplaced in a pot or female die C and expanded from within against thewalls of the pot, as by a plunger D, as indicated in Fig. 3. As the hooprests against the walls of the pot, it becomes embedded in the materialof the tub or other article, as shown in Figs. et and 5. The material ispacked snugly about the hoop without further change of its structuralcharacter than an additional compression in the Vicinity of the hoop.Vhen the article is dried, it will be held securely in position with nopossibility of becoming even slightly loose, and thereby permitting theexpansion and opening of the plications. The subsequent treatment andfinishing or enameling of the article will quite conceal the hoop, andthe complete article will have a smooth and unbroken surface botheXteriorly and interiorly,while the opening of the plications underpressure from within and the consequent cracking of the enamel will beeffectually prevented.

I claim as my invention- The herein -described method of making hollowware from paper-board and the like, which consists in drawing ormanipulating the material substantially into the desired shape,encircling the article with a hoop, eX- panding the article against thehoop to embed the same, and iinishing or drying the article,substantially as shown and described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM WV. MGEIVAN.

IVitnesses:

A. N. JESBERA, W. B. GREELEY.

